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//                        Intel License Agreement
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// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
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#include "precomp.hpp"

/*======================= FILTER LIST SHELL =====================*/
typedef struct DefBlobFilter {
	CvBlob                  blob;
	CvBlobTrackPostProcOne* pFilter;
	int                     m_LastFrame;
} DefBlobFilter;

class CvBlobTrackPostProcList : public CvBlobTrackPostProc {
protected:
	CvBlobTrackPostProcOne* (*m_CreatePostProc)();
	CvBlobSeq               m_BlobFilterList;
	int                     m_Frame;

public:
	CvBlobTrackPostProcList(CvBlobTrackPostProcOne* (*create)()): m_BlobFilterList(sizeof(DefBlobFilter)) {
		m_Frame = 0;
		m_CreatePostProc = create;
		CvBlobTrackPostProcOne* pM = create();
		TransferParamsFromChild(pM, NULL);
		pM->Release();
		SetModuleName("List");
	}

	~CvBlobTrackPostProcList() {
		int i;
		for (i = m_BlobFilterList.GetBlobNum(); i > 0; --i) {
			DefBlobFilter* pF = (DefBlobFilter*)m_BlobFilterList.GetBlob(i - 1);
			pF->pFilter->Release();
		}
	};

	virtual void    AddBlob(CvBlob* pBlob) {
		DefBlobFilter* pF = (DefBlobFilter*)m_BlobFilterList.GetBlobByID(CV_BLOB_ID(pBlob));
		if (pF == NULL) {
			/* Create new filter: */
			DefBlobFilter F;
			F.blob = pBlob[0];
			F.m_LastFrame = m_Frame;
			F.pFilter = m_CreatePostProc();
			TransferParamsToChild(F.pFilter, NULL);
			m_BlobFilterList.AddBlob((CvBlob*)&F);
			pF = (DefBlobFilter*)m_BlobFilterList.GetBlobByID(CV_BLOB_ID(pBlob));
		}

		assert(pF);
		pF->blob = pBlob[0];
		pF->m_LastFrame = m_Frame;
	};

	virtual void    Process() {
		int i;
		for (i = m_BlobFilterList.GetBlobNum(); i > 0; --i) {
			DefBlobFilter* pF = (DefBlobFilter*)m_BlobFilterList.GetBlob(i - 1);

			if (pF->m_LastFrame == m_Frame) {
				/* Process: */
				int ID = CV_BLOB_ID(pF);
				pF->blob = *(pF->pFilter->Process(&(pF->blob)));
				CV_BLOB_ID(pF) = ID;
			} else {
				/* Delete blob filter: */
				pF->pFilter->Release();
				m_BlobFilterList.DelBlob(i - 1);
			}
		}   /* Next blob. */
		m_Frame++;
	};

	int     GetBlobNum() {return m_BlobFilterList.GetBlobNum();};
	CvBlob* GetBlob(int index) {return m_BlobFilterList.GetBlob(index);};
	void    Release() {delete this;};

	/* Additional functionality: */
	CvBlob* GetBlobByID(int BlobID) {return m_BlobFilterList.GetBlobByID(BlobID);}

};  /* CvBlobTrackPostProcList */

CvBlobTrackPostProc* cvCreateBlobTrackPostProcList(CvBlobTrackPostProcOne* (*create)()) {
	return (CvBlobTrackPostProc*) new CvBlobTrackPostProcList(create);
}
/*======================= FILTER LIST SHELL =====================*/
